Electric long-distance indicating system



Nov. 28', 1939. H R. SCHEIDEGGER 2.131.682

ELECTRIC LONG-DISTANCE INDICATING' SYSTEM Qriginal Filed Jan. 18, 1929 15 Sheets-Sheet 2 (Fla/a;

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ELECTRIC LONG-DISTANCE INDICATING SYSTEM Original Fi led Jan. '18, 1929 15 Sheets-Sheet 4 INVENTOR v *L Hi ATTORNEYS Nov. 28, 1939. H. R. scHl-:IDEGGER 2.181.682

ELECTRIC LONG-DISTANCE INDICATING SYSTEM Original Filed Jan. 18, 1929 15 'Sheets-Sheet 5 c. WE -SN\ Nov. 28, 1939. H. R. SCHEIDEGGER 2.181,682

' ELEcTRIc LoNcz-msTANcE INDICATING sYs-rsm v Original Filed Jan. 18, 1929 15 Sheets-Sheet 6 ATTORNEYS Nov. 28, 1939.

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ELECTRIC LONG-DISTANCE INDICATING SYSTEM Original Filed Jan. l8, 1929 15 Sheets-Sheet 7 ATTORNEY Nov. 28,1939. H. R. scHElDEGGER 2.131.682

ELECTRIC LONG-DISTANCE INDICATING SYSTEM Original Filed Jan. 18, 1929 15 Sheets-Sheet 8 gif/2.

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ELECTRIC LONG-DISTANCE INDICATING SYSTEM Original Filed Jan. 18, 1929 15 Sheets-Sheet lO INVENTOR ATTORN EYS Nov. 28, 1939. H. R. SCHEIDEGGER 2,18L682 ELECTRC LONG-DISTANCE INDICATING SYSTEM Original Filed Jan. 18, 1929 15 Sheets-Sheet ll 111 TI OPEN pra HIGH

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ATTORNEYS Nov H R. SCHEIDEGGER ELECTRIC LONG-DISTANCE INDICATING SYSTEM UaAd cum; 1 mal' ATTORNEY5 Nov. 28, 1939.

H. R. scHEIDEGGER 2.181,682'

ELECTRIC LONG-DISTANCE INDICATING SYSTEM Original Filed Jan. 18, 1929 15 Sheets-Sheet 13 aff Nov. 28, 1939. H, R. scHElDEGGER ELECTRIC LONG-DISTANCE INDICTING SYSTEM Original Filed Jan. 18, 1929 15 Sheets-Sheet 14 a/W' Mr. map

ATTORNEYS Nov. 28, 1939. H. R. SCHEIDEGGER' ELECTRIC LONG-DISTANCE INDICATING SYSTEM 18, 1929 15 Sheets-Sheet 15 Original Filed Jan.

Patentecl Nov. 28, 1939 UNITED STATES PATENT FFICE ELECTRIC LONG-DISTANCE INDICATING SYSTEM Hans Robert Scheidegger, Berlin, Germany, as-

signcr to The Teleregister Corporation, New York, N; Y., a corporation of Delaware .Euiy 21, 1928 20 Claims.

This invention relates to electric long distance indicating systems of the type disclosed -in my application Ser. No. 333,477, filed January 18, 1929, Patent No. l,958,208 dated May 8, '1934 of .5, Which application this is a division.

Among the objects of this invention is the provision of electric long distance indicating systems in which the transmission of stock quotations, or other items of information, may be made at a rapid rate and the new set-up may be efiected inthe shortest time possible. Fcr the accomplishment of this and other objects mechanism is provided to transmit and receive an impulse or simultaneous impulses to control the selection of the ranges of stock, and an impulse or simultaneous impulsos'l to control the new setting of each of the indicators to the end that complete transmission of selecting and setting-up impulsos will require a period of time not longer than the time required for the transmission of a number of impulses equal to 1 plus the number of indicator wheels to beicontrolled.

The invention may include a check board in the transmitting station which may control the transmission of impulses to distant Stations representative of the angle, direction and extent of movement necessary to change from the old set-up to the new set-up. The invention includes mechanism under control of the transmitting mechanism and a check board or quotation board for determining the direction of the shortest movement necessary to effect the new set-up and for moving the indicators in such direction and terminating such movement after the new set-up has been efiected.

Other objects of the invention will' be apparen from the following description taken in connection with the drawings, in which- Fig. 1 shows a form of tape transmitting mechanism;

Fig. 2 shows a section of tape perforated to select the various ranges, or to control the setting-up of price digits on the selected indicators;

Fig. 3 shows a section of tape perforated to select a particular range and to set up a particular price; V

Fig. 4 shows one of the indicator units;

Figs. 5 and 6 taken together show schematically the arrangement of mechanisms in the transmitting and receiving Stations;

Fig. 7 shows diagramatically the transmitting contacts;

Fig. 8 shows diagrammatically one range of indicators and a selecting relay;

Fig. 9 shows the selection controlling relays;

Fig. 10 shows the relays for controlling the extent of movement of the various indicator wheels;

Fig. 11 shows a system of balancing relays for controlling the direction and extent of movemen of the selected indicator wheels;

Fig. 12 shows a mcdified form of transmitting mechanism;

Fig. 13 shows a modified form of relays for controlling the transmission to distant Stations under the control of the check board;

Figs. 14 and 15 taken together' constitute a diagrammatic showing of lthe wiring system for a distant station;

Fig.. 16 shows collector Switches in the distant station and the T and CL operation controlling relays; g.

Fig. 17 shows the indicator selection controllings relays; r

Fig. 18 shows the indicator setting controiling relays for the hundreds'indicator wheel; and

Fig. 19 shows the wiring arrangement for one range of indicators. v In the schematic arrangement shown in Figs. 5 and 6 the transmitting mechanism is indicated at S in Fig. 5. The designation Figs. 1 and 7 on the rectangle indicated by S is for reference to Figs. 1 and '7 in which a suitable form of transmitting mechanism is shown in detail. The rest of ythe mechanism shown in Figs. 5 and 6 constitutes a receiving mechanism which may be a check board in the transmitting station and is controlled over the lines LI, L2, LB, Lai and LE. As indicated in Fig. 7, other receiving Stations may be controlled over lines. L'l, L'E, L't, L'fii and L'5, the various receiving Stations being preferably connected in parallel and identical in construction with the receiving mechanism in the transmitting station. V

i In each receiving station, as shown in Fig. 5, are rotary distributor arms VRi to VRE which `cooperate with various contacts to control the range selection relays A RN and AR, and price controlling relays which control the setting-up operation of the indicators of a selected range, such price controlling relays being indicated at B-HR BR; C-TP, CR; D-UP, DR; and E--FP, ER; 'the letters H, T,U and F indicating` that thesev relays respectively control the hundreds, tens, units and fractions wheels of the selected range of indicators.

The relays A-RN control the relays AR both' of which are shown in detail in Fig. 9,, which over lines I to 28, as shown and indicated by SEL, Fig. 6, control the energization of the' range selection relays W-l to W-28, no relays being The details of the relays B HP, BR; c 'r1=,y

I'CR; D UP, DR; and E--FP, ER; above referred to are shown in Fig. 10, and each of` the groups of relays BR, CR, DR and ER may selectively establish any one of the eleven circuits which,V

in Fig. 6, are shown as cables designated H, T, U and F, which respectively energize thebalancing relays F indicated at the bottom of Fig. 6

and designated by I-I--F, T--F, U--F and F-F. These groups of relays are'all alike, one of which. is shown in detail in Fig. 11, and their function is to control the operation of the actuating magnets DN and DO of the i'ndicatorsshowndiagrammatically in Fig. 8 and detailed mechanically in Fig. 4. i

The function of the balancingl relays'I-IF, TF, UF and FF is to 'control the direction and extent of movement of the corresponding indicator z wheels so that the indicators will move directly from the old position to the new position in the shortest direction. v

As shown in the parentapplication, the impulses may be transmitted by a keyboard; of the character shown therein, or by a tape transmitting mechanism of the character such as shown therein and in this application.

As shown in Fig. 2, the tape may be perforated in any one or more of five longitudinal columns and these perforations through the sensingv mechanism, shown in Fig. 1, may 'control any one or more of five contacts, I to V, indicated by these characters at the top of Fig. 2, and in Figs. 1, and 7. A

As shown in Fig,` 2, it is possible by various combinations of perforations to effect 31- different selections all of which may be made use of in this system in selecting ranges of stock. Certain of these, indicated at I to I I, may be used to control the setting-up operation of the selected indicators.

As indicated in Figs. 1 and 7, operationof any of the contacts I to V will cause closing of the contact or contacts VI for purposes later'referred to.

When the operator is ready to transmit stock information under control of the tape the .tape is inserted in a sensing mechanism such as is shown in Fig. 1, after which the tape may be fed 1 forwardly by a pair ofsprocket wheels II] operpressing theA key TM, Fig. 7, which completes.

the energizing circuit for the relay Y. The relay Yprepares an energizing circuit at'its make contact y, for the relay AN Which circuit is conipleted by the closing of any oneV of theficontacts VI. The key TM also prepares a circuit for the magnet DMR whichv circuit extends over, the contact bl of the relay BL,.and is adaptedto be completed by the constantly. rotating interrupter Ub once during each rotation vof the interrupter. As the circuit through the niagnet DMR is completedv the pawl II Fig. I, is retracted and when the circuit. throughthe magnet. DMR is interrupted by theiinterrupter 153 the pawl II is moved forwardly by the springfIS to move the sprocket wheels It ahead one step to advance the tape I fil one step. As the first perforations ony the tape are advanced into position over the feelers E5, Figfl, the feelers are rocked clockwise by Springs It to close the ass'ociated contacts of the contacts I to V and the contact VI as indicated in Fig. l. There'are as many feelers provided as there are Columns on ythe strip, as is obvious.

tro] the group of selection relays ler-RN, shown in detail in Fig. 9, and designated AI to AV. The current from battery across the lines .AI to A5 is continued across the coils of the corresponding relays AI to AV to a common line IB which extends over the coil of relay Q in Fig. to ground, the function of which `will be referred to later, The relays -AI to AV at their contacts ai, at, at, as and 0:5 lock to ground over the line Elia vand over a contact tI of the unenergized relay T, Fig.v 10. The ground applied over the contact tl to line Za and across the lcontacts aI to' As the relays ARI to ARV pick up they con v nectl ground Which is normally applied to the line 22a over the coil of relay CL, Fig. 10, across the operated and normal contacts ari to m5, Fig. 9,4 to one of the lines I to 3! of which only lines I to 28 will Vbe considered as indicators for seven stocks of four ranges each are shown in the view I lays and the contact t2 of relay T. As the relay CL picks up it also conne'cts ground over the contacts clb, clc, old and clc, to lines 22h, 22o,

.22d and 22 which extendto the contacts of the BR, CR, DR and ER groups. of price controlling relays which control the setting-up operation respectively of the hundreds, tens, units and fractions indicators designated in Fig. 8 as HI, TI,l UI and FI. v

The operated relay W of which there is one for each range of stock, as shown in Fig. 6, applies ground at its make contacts hg, 'tg, ug and y, Fig. 8, to the brushes IN of the hundreds, tens, units and fractions indicator wheels I-II, TI, UI and FI. Each of the brushes IN cooperates with eleven fixed contacts numbered I to II, Fig. 8, which correspond respe'ctively to the 1 to 9, (i and blank positions of rotatable indicator wheels such as are well known in the art, When an in- I 'foi 'contactsof the. associated F relays, Fig-11, t0 -751'3 lines 24 and 25, Fig. 11, which control the operation of steering relays RN and RO each of Which is shown in Fig. 11 as two separate relays o-ne of each set of which is operated by current over the line 24 and the other by current over thei v line 25. The indicia 1 to 9, and blank are arranged in a continuous unbroken circular series on the indicator wheel, the same arrangement that is now used in practice and is well known in the art. The contacts I to ll, Fig. 8, which correspond to the indicia 1 to 9, 0 and b-lank are also arranged in a continuous unbroken circular series. For the purposes of illustration these contacts have been shown in the diagram in Fig. 8 as arranged in a semi-Circle The W relay also connects the DO and DN operating magnets for the indicators of the selected group to lines N and O which in Fig. 11 are adapted to be connected over contacts rn and ro` of the steering relays RN and RO controlled by the associated F relays to line 26 which is connected over a break contact p of the relay P to line 21 Which, on Fig. 10, is connected across an operated contact cZp of relay CL and line 23 and the coil of relay T to the interrupter UBR. The interrupter UBR is a constantly rotating interupter and is preferably synchronized with the interrupter Ub` in the transmitter shown in Fig. 7 As the interrupter UBR rotates it connects ground to the lines 28 and 2'l and over the contacts p of relays P to the lines of the relays RN and RO -controlling the operation of the various indicator magnets DN and DO. l

As shown in Fig. 6, there is one group of relays HF common to all the hundreds indicator wheels, another group TF common to all the tens indicator wheels, another group UF common to all the units indicator wheels, and another group FF common to all the fractions indicator wheels. The relay W, as shown in Fig. 8, connects the energizing circuits of the magnets DN and DO of the hundreds indicator HI, across the contacts whn and who, to the lines N and O leading to the contacts rn and ro of the RN and RO relays associated with the group of F relays for the hundreds indicators. Similarly, the relay W connects the DO and DN magnets for the tens indicators, units indicators and fractions indicators over contacts wtn, wfo; wfzm, wuo; and wn, wo to the'lines N and O which lead respectively to the contacts nr and or of the relays RN and RO controlled by the F relays associated with the tens, units and fractions indicators.

The relay Q, Fig. 10, as before stated, was operated in series with the 'operated relay of the group AI to AV, Fig.` 9. As it was operated it applied ground vover its contact q to line which is extended over the distributor arm VRG and lover the line connecting the first, third, fourth, fifth and sixth contacts of the distributor to one terminal of the magnet DVR to the other terminal of which battery is applied. The magnet DVR is the operating magnet for the distributor arms VRI to VR5, Fig. 5, and the distributor arm VRG, Fig. 10, and causes these arms to move forward, after the circuit of the magnet DVR is broken at the contact q upon deenergization of the relay Q Which occurs as the tape is stepped forward upon deenergization of the stepping magnet DMR, Figs. 7 and 1. The magnet DMR isl energized and deenergized once during each rotation of the interrupter Ub, Fig. '7. As the tape is stepped forward it opens the circuit through the first coil of each of the energized relays AI to AV and the coil of the Qrelay, Fig.

10, which latter in turn opens the circuit of the operating magnet DVR, permitting mechanism of the type shown in Fig. 1 to step the distributor arms VRl to VRG ahead one step.

As shown in Fig. 5 the distributor arm VRl in its second position makes contact with the fixed contact which is connected by a line 3l to the line l8 which, as stated before, is the battery lead for the relay Q. The other distributor arms VRZ to VR5 do not make contact with any fixed contacts in the second position. As the relay Q picks up it connects ground over its contact q to line 30 which continues over the distributor arm VRG and the second contact of the distributor arm to line 32 and across a normalmake and break contact t3 of the unenergized relay T to line 33-which is connected to the line connecting the other stationary contacts of the distributor VRfi which is the ground for the opcrating magnet DVR. This causes energization of the magnet DVR and forward stepping movement of all the distributor arms VRl to `VRl after deenergization of the magnet due to the stepping movement of the tape so that the distributor arms Will make contact with the third of the associated fixed contacts.

. The tape has been stepped up ahead so that a third series of perforations control the sensing members l5, Fig. 1, to control the various contacts I to V and the contact VI to apply battery to the various lines LI to L5. As the distributor arms VRl to VR5 are in the third position battery is continued over the lines Bl to B5 Which, as indicated in Fig. 5, extend to the group B-HP relays detailed out in Fig, 10 and indicated respectively as BI to BV. The lines Bl to B5 extend around the coils of relays BI to BV and are connected to the line l8 which is the energizing lead of relay Q. This causes the relays BI to BV and the relay Q to pick up in series in the same manner in which relays AI to AV and Q picked up as selection of a range of indicators fwas effected. As the relays BI to BV pick up they close their contacts bl, to bl5, and complete a holding circuit from battery over the second coil of each energized relay and the contacts bl to b and lies 20h and 22h and a contact clb of relay CL to ground. At the same time, battery is extended from the corresponding relays IBRI to BRV and across the contacts bl to b5 to line 2b causing the relays BRI to BRV to lock over the line Zb and contact clb. As the relays BRI to BRV pick up they connect ground applied over the contact clb of the relay CL to the line 22hV which is continued across the operated and normal contacts brl, br2, br3, brll and br5 of relays BRI to BRV to one of the eleven lines indicated by l to l l at the right in Fig. 10 Which, as shown in Figs. 6 and 11, are the ground leads for the relays Fl to FH associated With the hundreds indicator wheel HI. This causes one of the relays Fl to FH corresponding to the nu-- merical value of the new setting of the hundreds indicator to pick up. As one of the relays Fl to Fl l picks up it breaks the series connection between the various resistances Rol to Roll at its contacts fl to ll and connects the associated line from the hundreds indicator in Fig. 8 to the ground lines of the relay P. Relay F also connects various of the lines coming from Fig. 8 across its contact 24 to the line 24 and across its contact 25 to the line 25. If We assume that the set-up on the hundreds indicator is 8, and that the new set-up is to be 4, then ground extended over the contact hg of relay W, Fig. 8,

is extended over the arm IN and over the line 8, Fig. 8, to the line 8, Fig. 11, across four resistances. Ro to Roi! to the line 34 connected across the contact fl of relay Fl to line 35 which is connected across the contact 25 of relay Ft to line 25 which is the ground lead for one coil of each of the steerng relays RN and RO. Ground on line 3 is also continued across resistance Rol and the contact 's'a of relay F7, to line 36 Which is connected across the contact i of relay F4 to line 2d which is the ground line for the other coils of the steering relays RN and RO. As the resistance in the circuit 2d is smaller than the resistance in the circuit 25 the relays RN and RO will be controlled in such a manner that the contact ro will remain in the position indicated, and the contact m will connect the line 25 Y'to they N line. The line 2%, as stated before, is connected across the contact p of the relay P to the line 2'5 connected across the contact clp of the relay CL to the line 28, which is connected over the coil of relay T, Fig. 10, and is adapted to be grounded by the interruptor UBR once between each rotation of the interrupter. As the interruptor applies ground to this circuit ground is extended over the contact m to the line N, Fig. ll, which in Fig. 8 is shown as extended across the contacts whn of the relay W and across the coil of the magnet DN of the hundreds indicator HI to the ground line of a second coil of relay W the energizing lead of which is connected across the resistance Wi to battery and ground. The relays W, DN and T pick up in series whenever the interrupter UBE. applies ground to the coil of relay T. This causes the magnet DN to attract pawl 38 to move the indicator HI in Va clockwise direction from the position B toward the position 4, as is well understood. As the relay T, Fig. 10, picks up it disconnects battery at its contact t2 from ythe line 23 so that the relay W will be held up over the new circuit established to energize the magnet DN. Both the relays W and T are slow releasing so that they remain energized as long as impulses con- 'tinue The resistance Wi prevents energization of another Wrelay as long as any W relay is energized. l

With the indicator arm IN in ic next position in contact with the Seventh fixed contact, the

number of resistances in the lines 211 and 25 changed, but the number of res'stances in the line 215 will remain smaller t .an the number in line 25 causing the magnet DN to be energized succes'sively until the indicator arm IN reaches the new position of adjustment, that is, engages the Icontact When the indicator engages the contact 4 ground will be applied to the line li leaving Fig. 8 and entering Fig. li andas the relay Ft, Fig. il, is energized under control of lthe BRI to BRV relays, ground will continue across the contact fl to the line lfl which is the ground line for the relay P. As the relay P nicks up it opens the circuit for the magnet DN at'its contact p thus preventing further backward movement of the indicator HI. The indicator HI has been moved directly from the eighth position to the fourth position by the shortest possible movement.

As the tape is being moved forward'the groups of relays C-TP, CR; D-UP, DR; and E-FP, ER which respectively control the tens price, the units price and the fractions price, are energized to control in conjunction with the indicator brushes or arms IN of the tens, units and fractions indicators their respective F relays to control the operation of their respective DN and DO magnets so that .all the indicators in which a new setting-up operation is required are adiusted substantially simultaneously. The magnet DO' op-. erates the indicator forwardly by actuation of the pawl tt' as is well understood. As the various indicators are moved into a new set-up position their associated P relays are energized and be sent out over the interrupter UBR and accordingly the relay T will deenergize and as ity deenergizes it removes ground over tc, td and te, from the circuits to and over the groups of relays B, C, D and E causing the various relays B, C, D and E, and relays F to release.

Method ocpemtion o the system describedv It is assumed that the range to be selected is ,the number 4 range which is the last range of the first stock on the board, and that the indication on this range is 842.6 Aand that the new price to be set-up is 785.3. .A strip perforated to select range ll and to transmit the new price is illustrated in Fig. 3.

initlally its contacts tb,

The operator closes the switch TM, Fig. '7, g

which closcs the circuit foi' relay Y. The circuit as follows: Ground, switch ''.Ch pole, ground. l

At the same time the circuit for the paper feed-` ing magnet DMR is closed, which is as follows: Ground, sender TM, interruptor Ub', .contact bl, winding of DMR, negative pole, ground.

The stepping magnet DMR, Pigs. 1 and '7, ac.- tuat'es the tape feeding wheel lilwhich moves the tape ahead one step. As the first line of perforations slides over the sensing members l the latter close the contact III and the contact VI. The latter contact completos a circuit from ground across contact VI, across contact'y, and

winding of Y, negative winding of AN to battery. The relay AN attracts its armature cm and closes the following circuit:

Ground, battery, contact an. contact III, line 1.3, distributor arm VRi. 5, conta ct A3, one of the windings of relay AIII, Fig. 9, of the selecting groupof relays. and across the line LB and the coil of relay Q, Fig. 10, to ground.

The relays AIII and Q are then energized and close the following circuits:

(a) Ground, contact tl. line 26a, contact'a, one of the windings of relay AIII to battery and ground, and also the winding of relay ARIII to battery and ground.

(b) Ground, contact q of relay Q, distributor VRG, contact l, winding of the Vrnagnet DVR, to

the distributor arms are now in'the second positicn.

The paper will be fed forwardly upon deenergization of the electrornagnet DMR and thenext following perforation in'the .strip will control the closing of the I and VI contacts so that the following circuit will be made:

Ground, battery, contacts em, contact I, line arm VR, line 32, contact t3 of relay T, line 33,

coil of the magnet DVR to battery and ground. The magnet DVR receives an impulse and moves the distributor arms ahead one step.l The arms of the distributors are now in contact With the third contacts. l

Each time impulses' are transmitted under ,control of the tape over the lines LI to L the magnet DVR is energized under control of the relay Q which attracts its contact q, which again releases as soon as the current is interrupted in the transmitter, thereby permitting the distributors to be moved ahead one step. 'I'he function of the distributor is' to distribute the impulses transmitted under control of the paper to the groups of relays A, B, C, D and E over which they may control respectively the selection of the range of stock and the new setting-up operation of the hundreds, tens, units and fractions indicator Wheels.

As ,described above, after the first set of perforations have been sensed the relays AIII and ARIII are held up over the contact tl of the relay T, Fig. 10.

Relay ARIII attracts its contacts m3 and closes the selector circuit, which is as follows:

Positive pole, Winding of the relay CL, line 22a, contact ari, contact ar2, operated contact ar3, contact ard, contact m5, line 4, one of the windings of the selecting relay W-4 which may' tion for selection will then be completed.

The actuation of the first or hundreds indicator HI, Fig. 8, will be efiected in the following manner:

As soon as the perforations corresponding to the digit '7 are fed over the feelers l5 the contacts III, IV, V and VI will be closed. The' following circuits will be made:

(a) Ground, battery, contact cm, contact III, line LS, distributor VR3, contact 3, line B3, winding BIII, Fig. 10, and winding'Q to ground.

(b) Ground, battery, contact an, contact IV, line Lli, distributor VR4, contact 3, line B4, winding BIV, and winding Q to ground.

(c) Ground, battery, contact an, contact V, line L, distributor VRV, contact 3, line B5 winding BV, and winding Q to ground.

Relay Q receives an impulse and as stated before completes a circuit for the operating magnet DVR, the latter causing all of the distributor arms to be moved ahead one step to contacts 4.

The distributor arms are now in contact With the fourth sets of contacts. and the relays BIII, BIV and BV were energized and their armatures b3, bd and b5 are attracted. These relays remain energized over the following circuits:

(a) Ground, contact clb, line 22h, line 2% contact bt, and winding BIII to battery and ground.

(b) Ground, contact clb,` line 22h, line 2%,

contactv 114, and` winding BIV to battery and ground.

'(c) From groundcontact clb, line 22h, line 2Gb, contact b5, `and winding BV to battery and ground. f f

At the same time the circuits of the relays BRIII, BRIV and BRV Will be closed by the relays BIII, BIV, and BV over the operated contacts .b3, bil and b5 and the contact clb1 of the relay CL.

The relays BRIII, BRIV, BRV attract their contacts and close the following circuit:

Ground, contact clbgline 22h, normal contact brl, normal contact br2, operated contact br3, operated contact br4, and operated contact br5, across the line 'l (Fig. to line 1 (Fig. 11) and across the coil of 'the relay Fl to battery. and

ground. i

The lines I to H of the BR relaysare the lines over Which circuits are made to control the energization of the F relays' associated with the hundred indicators.

As the hundreds indicator is in position vto exhibit the numeral 8 the line 8 extending from this indicator, Fig. V8, is connected over the indicator arm IN and the contact hg of relay W to ground.

As the relay Fl, Fig. ll, has been energized under control of the B relays the series of resistances Ro are broken at the contact fl and ground on the line 8 is connected across two resistances Ro8 and Rog and the line 42, and across the contact 24 of lrelay `F'l to the line Ground onthe line 8 is also connected across four resistances Ro8 to Roll at the right of Fig. 11, across line 34, contact l of relay FI, line 35, and across three resistances'Rol t'oRo3 andline 4!, and across the contact 25 of relay FT, to

line 25,I As there are more resistances in`the circuit 25 than lin the circuit 24 the contact rn. will close and the contact ro will' remain open so that the circuit for the relay DN of the hundreds indicator will be closed. This circuit will be as follows: z

From ground across interrupter UBR, winding of the relay T, contact clp, line 21, contactp, contact rn, contact whn, coil of the relay DN, a second winding ofthe relay W, resistances Wi to battery and ground. A

The electromagnet DN receives an impulse and moves the indicator IN backward one step. Ground is then connected by means of the contact'hg to the line l so that the following circuit is closed:

From 'ground indicator arm IN, contact 'Lline 1, contact 'l, line M, coil of relay P to battery and ground.

The relay P attracts its contact p and interrupts the circuit for the operating magnet DN so that the hundreds indicator will remain in the position 7.

As the circuit for the magnet DN is made across the relay T this relay Will be energized and at' the contact tl interrupts the holding circuits for the relays AIII and ARIII which release their contacts thereby opening by means of the relay ARIII the circuit for the relays CL and W-4 so that the winding of the relay CL and the first Winding` of the relay W-4 will become currentless.

The relay T holds the various circuits described closed even though` the contacts of the relay CL remain interrupted. The relays T and W remain attracted until the time when the explorng relays P corresponding to they hundreds, tens, units and fractions indicator wheels are ener- 

